<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>流程控制-选择结构</h1>
    {% if uname == 'sxt' %}
        <p>尚学堂</p>
    {% endif %}

    {% if age >= 18 %}
        <p>成年人</p>
    {% else %}
        <p>未成年人</p>
    {% endif %}

    {% if score >= 90 %}
        <p>A</p>
    {% elif score >= 80 %}
        <p>B</p>
    {% elif score >= 60 %}
        <p>C</p>
    {% else %}
        <p>D</p>
    {% endif %}
</body>
</html>